offsets, then the i e diameter needs to be increased.
Sufficient incoming air in the installation room for combustion must be observed. Building
Regulation Document Part J require that a fixed air su ly from the outside should be
installed into the room where the stove is sited for the combustion air (Refer to Part J,
Section 2, Table 1: Air su ly to solid fuel a liances).
Forced-air ventilation systems, extractor hoods or similar a liances which are installed in
the same area as the stove will result in an increased demand on the incoming air su ly.
In such cases, lease ensure that there is sufficient air able to enter the area to su ly the
stove and other a liances.
Attention should also be aid to having room in the stove chamber for any i ework, the
load unit etc. Serviceable arts of the system should be sited outside of the chamber or
a ro riate rovision made for access.
End users should be strongly recommended to fit a smoke alarm and be guided to fit a
carbon monoxide alarm in accordance with BS 8511:2012 (Annex C.5)
2.2 Hearth
The sub-base and hearth must be able to carry the full weight of the boiler stove. The
stove should be ositioned on or above a non-combustible hearth and the hearth should
extend a minimum of 300mm in front of the stove door.
If the stove is raised u and the hearth is to be at floor level then we recommend that you
increase the de th of the hearth to ensure that any embers that accidentally fall from the
stove land on the hearth and not the floor. Please refer to Building Regulations A roved
Document J for more s ecific details
2.3 The Chimney
The chamber should be closed off above the stove with a concrete slab, lintels or fire roof
stud work.
The following chimney designs are ossible:
•Brick wall chimney: This should be lined with umice liners (not clay liners) of the
correct diameter and the starter block should be set on the slab. The stove is then
connected to the starter block with an adjustable length of single skin flue.
•Assembled steel insulated chimney: The hole in the chamber roof should be a good
fit around the i e using a fire sto late.
•Stainless steel flexible liner (suitable for solid fuel, either 316 or 904 grade liners):
The liner should be insulated. The stove should connect to the a liance via a
length of rigid flue at least 500mm long. The liner should be firmly fixed to the
chimney wall with a bottom su ort bracket or, if that isn't ossible, then every i e
connection, including the connection to the stove, should be secured with at least
two stainless steel self-ta ing screws. The flexible liner should be insulated. The
chimney should be fitted with a cowl or a ro riate chimney ot to revent rain
entry.
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